稻瘟病穗瘟防治适期初探
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摘要
本研究于2015-2016年对江苏沿江稻区水稻穗瘟不同防治时期病穗率防效和病指防效进行分析,发现防效与用药时间之间存在显著的二次或三次曲线关系。以两年的试验结果进行模拟的二次曲线方程理论值与实测值间的误差较小,方程的适合性较好。明确在前期雨水较多湿度较高时,应当适当提早用药,可将预防时间提早到破口日前5～7 d,以后再根据天气情况,决定是否再次用药防治;而在破口日前后降水较少的年份,则可等到破口日前5～6 d至破口40%进行防治。
This study focus on the correlations between the control effects and the sprayed date of fungicide for rice blast at rice panicle stage in 2015 and 2016, Jiangsu Province. The result showed that the relationship of them could expressed as the conic or cubic equation, especially the conic equation has low errors between the theoretical value and the actual value. In the situation of more rain days and high humidity, the application of fungicides should be appropriate early than normal, 5 to 7 days ahead the rice breaking, on the contrary, the control time could be chosen from 5 to 6 days ahead the rice breaking to the day when 40% of rice breaking occurred.
This study focus on the correlations between the control effects and the sprayed date of fungicide for rice blast at rice panicle stage in 2015 and 2016, Jiangsu Province. The result showed that the relationship of them could expressed as the conic or cubic equation, especially the conic equation has low errors between the theoretical value and the actual value. In the situation of more rain days and high humidity, the application of fungicides should be appropriate early than normal, 5 to 7 days ahead the rice breaking, on the contrary, the control time could be chosen from 5 to 6 days ahead the rice breaking to the day when 40% of rice breaking occurred.
引文
[1] 孙国昌,杜新法,陶荣祥,等.水稻稻瘟病防治策略和21世纪研究展望[J].植物病理学报,1998,28(4):289-292.
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[3] 肖丹凤,王玲,黄世文,等.中浙优系列组合对稻瘟菌的抗性现状[J].浙江农业科学,2013(3):300-303.
[4] 赵正洪,周政,吴伟怀,等.湖南稻瘟病菌生理小种的组成及其致病性[J].湖南农业大学学报(自然科学版),2014,40(2):173-177.
[5] 朱凤,田子华,邰德良,等.从2014年稻瘟病重发谈今后防控对策的改进[J].江苏农业科学,2016,44(8):155-158.
[6] 孙雪梅,易红娟,刘嘉德,等.2014年通州区水稻穗颈瘟大流行原因及其综合防治措施[J].中国植保导刊,2015,35(5):43-45.
[7] 刁春友,朱叶芹等.农作物主要病虫害预测预报与防治[M].南京:江苏科学技术出版社,2006:49-52.
[8] 柯汉云,赵帅锋,许渭根,等.水稻稻曲病防治药剂筛选与防治适期确定[J].中国植保导刊,2017,37(10):64-65.
[9] 易红娟,王节萍,孙雪梅,等.江苏沿江稻区水稻纹枯病病情扩展时间动态模型[J].江苏农业学报,2016,32(6):1256-1261.
[2] 阮宏椿,杨秀娟,陈双龙,等.福建省水稻新品种对稻瘟病菌的抗性鉴定与评价[J].福建农业学报,2006,21(4):304-307.
[3] 肖丹凤,王玲,黄世文,等.中浙优系列组合对稻瘟菌的抗性现状[J].浙江农业科学,2013(3):300-303.
[4] 赵正洪,周政,吴伟怀,等.湖南稻瘟病菌生理小种的组成及其致病性[J].湖南农业大学学报(自然科学版),2014,40(2):173-177.
[5] 朱凤,田子华,邰德良,等.从2014年稻瘟病重发谈今后防控对策的改进[J].江苏农业科学,2016,44(8):155-158.
[6] 孙雪梅,易红娟,刘嘉德,等.2014年通州区水稻穗颈瘟大流行原因及其综合防治措施[J].中国植保导刊,2015,35(5):43-45.
[7] 刁春友,朱叶芹等.农作物主要病虫害预测预报与防治[M].南京:江苏科学技术出版社,2006:49-52.
[8] 柯汉云,赵帅锋,许渭根,等.水稻稻曲病防治药剂筛选与防治适期确定[J].中国植保导刊,2017,37(10):64-65.
[9] 易红娟,王节萍,孙雪梅,等.江苏沿江稻区水稻纹枯病病情扩展时间动态模型[J].江苏农业学报,2016,32(6):1256-1261.